Myself and a few co-workers have recently become addicted to eating pretzels all day long.
At any rate, we all decided to try to bite the number 6 out of a pretzel. It's a LOT more difficult than what it would first seem. Only Mike and I were able to accomplish this feat and here is my photographic proof.
If you think you have the skills, go ahead and try. You can ONLY seperate the pretzel hunks with your teeth - no fingernails or breaking them by other means.